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      Question

      The quantity of milk in a mixture is 80 litres more than

      that of water in it. 100 litres of water is added to the mixture such that the quantity of milk in the resultant mixture is 90% of the quantity of water in it. Find the ratio of initial quantities of milk and water respectively.
      A 2:5 Correct Answer Incorrect Answer
      B 7:5 Correct Answer Incorrect Answer
      C 4:5 Correct Answer Incorrect Answer
      D 9:5 Correct Answer Incorrect Answer
      E none of these Correct Answer Incorrect Answer

      Solution

      ATQ, we can say that Let the initial water be 'x' litres. Then Initial milk will be = (x + 80) litres  (x + 80)/(x+ 100) = 9/10 x = 100 so, Initial water  will be = 100 litres  and, Initial milk will be = 180 litres  hence, the Required ratio  will be = 9:5

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